MXZ-SM48NAMHZ Service Manual

53
OCH789
E. Example of a system using Branch Box and A-Control indoor unit
Examples of Transmission Cable WiringWiring Method Address Settings
a. Always use shielded wire when making connections between the outdoor unit (OC) and the Branch Box, as well for
all OC-OC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3)
of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable terminal block (TB5)
of the Branch Box.
c. Connect terminals 1 and 2 on the transmission cable terminal block (TB5/TB15) of the A-control indoor unit (A-IC), to
the terminal block on the MA remote controller (MA-RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor
unit (OC).
e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit board.
f. The earth processing of S terminal for the centralized control terminal block (TB7) is unnecessary. Connect the termi-
nal S on the power supply unit to the earth.
g. Set the address setting switch as follows.
Unit Range Setting Method
A-IC 01 to 50
According to the set address of connected Branch Box, set the A-IC addresses
sequentially by SW1 on Branch Box.
(For example, when setting the Branch Box address to 01, A-IC addresses set
02,03,04, and 05. )
Branch Box 01 to 50
Use a number within the range 1–50, but it should not make the highest
address of connected A-IC exceed 50.
Outdoor Unit 51 to 100
Use the smallest address of all the Branch Box plus 50.
The address automatically becomes “100” if it is set as “01–50”.
MA Remote Controller -
Address setting is not necessary.
A: Shielded wire
( ): Address example
TB7
TB3
(51)
L
3
L1
OC
TB7
(53)
OC
Power Supply
Unit
System
controller
L
4
L5
M1 M2
S
M1 M2
S
S
M1 M2
S
TB3
M1 M2
S
M1 M2
S
M1 M2
TB3A
A-IC
(01)
(02)
(03)
(04)
MA-RC
WL-RC
WL-RC
(05)
S1
S2
S3
TB
S1
S2
TB5/TB15
B
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB3B
S1
S2
S3
TB3C
S1
S2
S3
TB3D
S1
S2
S3
TB3E
S1
S2
S3
M1
M2
S
TB5
L
(01)
2
A
A
Branch Box
A
A-IC
A-IC
A-IC
A-IC
MA-RC
MA-RC
TB5/TB15
TB5/TB15
A
L
6
m
1
TB3A
A-IC
(06)
(07)
(08)
MA-RC
WL-RC
S1
S2
S3
TB
S1
S2
TB5/TB15
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB3B
S1
S2
S3
TB3C
S1
S2
S3
TB3D
S1
S2
S3
M1
M2
S
TB5
(06)
Branch Box
A-IC
A-IC
MA-RC
TB5/TB15
TB3E
S1
S2
S3
B
A
1
2
1
2
1
2
1
2
1
2
B
A
B
A
B
A